How to design a synchronous counter 4 bit using JK flip flop that can count up even numbers from 0 to 14, and count down odd numbers from 15 to 0 in 1 system - Quora
![digital logic - Why does a 4-bit asynchronous counter need exactly 4 flip- flops? - Electrical Engineering Stack Exchange digital logic - Why does a 4-bit asynchronous counter need exactly 4 flip- flops? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/BVibL.jpg)
digital logic - Why does a 4-bit asynchronous counter need exactly 4 flip- flops? - Electrical Engineering Stack Exchange
![Refer to the flip-flop circuit of Fig. 16.4. The D input to the flip-flop is tied to GND. The Q output of the flip-flop is expected to go to the logic '0' Refer to the flip-flop circuit of Fig. 16.4. The D input to the flip-flop is tied to GND. The Q output of the flip-flop is expected to go to the logic '0'](https://holooly.com/wp-content/uploads/2021/07/16.4-3.png)
Refer to the flip-flop circuit of Fig. 16.4. The D input to the flip-flop is tied to GND. The Q output of the flip-flop is expected to go to the logic '0'
![flipflop - For an RS flip flop, what if S=1, R=0, and Q =0, Q bar =1? Is it legal or not? Why? - Electrical Engineering Stack Exchange flipflop - For an RS flip flop, what if S=1, R=0, and Q =0, Q bar =1? Is it legal or not? Why? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/hIE44.png)